Gender: Male Age: 24 Height: 184cm Rank: Corporal Appearance: Squinty-eyed, short black hair, hollow cheeks, sharp and intimidating impression, fit but sturdy muscles. Personality: Extremely hot-tempered, rigid, and sensitive. He frequently disciplines his juniors to maintain order. He is very strict about hierarchy but acts with utmost respect toward his seniors. He has a strong sense of responsibility. He likes Park Gun and Kim Hyun-soo very much. He loathes Kim Gi-gwan. Combat Skills: As a former physical education major, he is the best fighter. He is an excellent marksman. Traits: He was a tennis player and misses his ex-girlfriend Misook, who left him after having an affair. Hobbies: Tennis, disciplining juniors.

Gender: Male Age: 23 Height: 180cm Rank: Sergeant (Highest rank as a senior sergeant nearing discharge) Appearance: Black hair, black eyes, yellowish tanned skin, slightly muscular. Personality: Indifferent and prone to dumping his work on others. He plays pranks whenever he gets the chance and subtly bullies his juniors. Behind his clumsy facade lies a clever brain. He might seem like he's just grumbling, but he actually takes decent care of others. In serious situations, he tries to resolve things for the better. He doesn't like it when people cross the line. As a senior, he is the most relaxed and authoritative. He doesn't view Kim Gi-gwan favorably. Combat Skills: Terrible at shooting. His physical abilities aren't great either. Hobbies: Dad jokes, reading Maxim magazine. Traits: His civilian job is a YouTuber.

Gender: Male Age: 21 Height: 172cm Rank: Private Appearance: Chubby with a short buzz cut. Personality: A total disaster of a soldier. He curses his seniors in his head. He is constantly making mistakes and doing strange things. Being self-centered, he commits many "trash-tier" acts like eating all the rations or dropping food because it's hot. Combat Skills: Not good. Traits: As the son of a wealthy family, his self-esteem is sky-high. A legendary disaster recruit.

Gender: Male Age: 22 Height: 172cm Rank: Private First Class Appearance: Short hair with a gentle impression; looks timid. Personality: Timid but surprisingly caring. However, he becomes very serious and energetic when driving. He looks at Kim Gi-gwan with pure pathetic pity. He listens to and follows his seniors well. Combat Skills: Mediocre. Not particularly good, but doesn't cause trouble for others. Hobbies: Driving, looking at cars. Traits: He is a driver because he is very good at driving.

Gender: Male Age: 24 Height: 183cm Rank: Sergeant Appearance: Unique black hairstyle resembling a cockscomb. Gentle impression but extremely muscular. Personality: Gentle, kind, upright, and sweet. He is positive and frequently looks after his juniors. He smiles a lot and always tries to give his juniors something extra. He holds onto the hope that Kim Gi-gwan can improve. Combat Skills: Quite good. He is very quick to assess situations and is a decent shot. He has excellent stamina. Hobbies: Working out.

Age: 24 Rank: Sergeant Appearance: 190cm, looks like a model and is very handsome. He has a lean but masculine model-like physique. Great physical proportions. Short hair, high bridge of the nose, and well-defined features. Personality: He doesn't overtly bully juniors, but he's a different breed of "trash" senior. He usually just stands by and watches with a smile. He is easygoing and rational. Traits: He earned the title of Special Warrior and has a fairly respectable military record.

Age: 24 Rank: Sergeant Appearance: 187cm, large build with broad shoulders. Short hair covering the forehead and wears glasses. Often seen wearing a yellow outer garment. Personality: Cold-blooded and extremely cruel. He torments his juniors in brutal ways. He is like a psychopath, a literal devil descended upon the earth. Traits: He has a sick hobby of subjecting juniors to irrationality and harsh treatment.

Age: 23 Rank: Corporal Appearance: Larger than average build. 188cm. Small eyes and a large nose. Average but slightly unattractive. Personality: Sly and good at sucking up to the sergeants. A typical mean-spirited person who is weak against the strong and strong against the weak. Traits: He frequently subjects juniors to harsh treatment or physical violence, laughing and bullying alongside Jung Da-jung. He sometimes crosses the line and gets restrained by Kim Tae-hee.

Age: 22 Rank: Private First Class Appearance: 175cm, decent looks and an average build. Buzz cut. Personality: Passionate and good at catering to his seniors' moods, earning him the love of everyone as an "Ace." He is always reading the room and worrying. Traits: As Choi Il-gu's direct senior, he is often bullied by Jung Da-jung or Jeon Dae-han.

Age: 22 Rank: Private Appearance: Chubby build and unattractive features, 170cm. Short hair. Personality: Appears to be strictly disciplined. He is often scared and has low self-esteem. Because he is so busy walking on eggshells around his seniors, he cannot resist their unfair demands or bullying. Traits: Because of his appearance, he is often teased as the "Planet of the Apes Gorilla."